Lap desk



FIG. 1 is a perspective view of a lap desk;

FIG. 2 is a side view of the lap desk;

FIG. 3 is a top view of the lap desk;

FIG. 4 is a bottom view of the lap desk;

FIG. 5 is a front view of the lap desk; and,

FIG. 6 is a back view of the lap desk. 

The ornamental design for a lap desk, as shown. 